Geo-fence selection system

ABSTRACT

The present invention relates to improvements to systems and methods for determining a current location of a client device, and for identifying and selecting appropriate geo-fences based on the current location of the client device. An improved geo-fence selection system performs operations that include associating media content with a geo-fence that encompasses a portion of a geographic region, sampling location data from a client device, defining a boundary based on the sampled location data from the client device, detecting an overlap between the boundary and the geo-fence, retrieving the media content associated with the geo-fence, and loading the media content at a memory location of the client device, in response to detecting the overlap.

PRIORITY

This application claims the benefit of priority to U.S. patent application Ser. No. 15/912,769, filed on Mar. 6, 2018, the benefit of priority of each of which is claimed hereby, and each of which is incorporated by reference herein in its entirety.

TECHNICAL FIELD

Embodiments of the present disclosure relate generally to mobile computing technology and, more particularly, but not by way of limitation, to systems for determining a location of a client device for the purposes of geo-fencing.

BACKGROUND

A “geo-fence” is a virtual perimeter created around real-world geographic locations. Traditional geo-fence services provide merchants or other businesses with a capability to create a geo-fence around the merchant or business' location. When a user enters or exits a perimeter of one of these geo-fences with a location-aware device (e.g., a smartphone), a notification related to the location may be transmitted to the user's device. Such notifications are often used as a marketing tool to entice nearby users to patronize these locations. Some social media platforms employ geo-fencing for location-based functionality, for example providing location-based collections of social media content, or making available themed location overlays or stickers for augmenting social media posts.

Traditional methods of delivering notifications related to the locations through the use of geo-fences have inherent limitations. For example, location accuracy of a device is often limited as a result of poor or slow network connectivity. As a result, a device may enter and exit the perimeter of a geo-fence before a traditional geo-fencing system is actually able to deliver content to the device. Furthermore, location data retrieved from the device may not accurately define a location of the device at all.

BRIEF DESCRIPTION OF THE SEVERAL, VIEWS OF THE DRAWINGS

To easily identify the discussion of any particular element or act, the most significant digit or digits in a reference number refer to the figure number in which that element is first introduced.

FIG. 1 is a block diagram showing an example messaging system for exchanging data (e.g., messages and associated content) over a network in accordance with some embodiments, wherein the messaging system includes a geo-fence selection system.

FIG. 2 is block diagram illustrating further details regarding a messaging system, according to example embodiments.

FIG. 3 is a block diagram illustrating various modules of a geo-fence selection system, according to certain example embodiments.

FIG. 4 is a flowchart illustrating a method for retrieving and loading media content at a client device, according to certain example embodiments.

FIG. 5A is an illustration of location data sampled by a geo-fence selection system, according to certain example embodiments.

FIG. 5B is an illustration of a boundary generated based on location data sampled by a geo-fence selection system, according to certain example embodiments.

FIG. 5C is an illustration of a boundary generated based on location data sampled by a geo-fence selection system, according to certain example embodiments.

FIG. 6 is a flowchart illustrating a method for retrieving and loading media content at a client device, according to certain example embodiments.

FIG. 7 is a table comprising location data and timestamps, according to certain example embodiments.

FIG. 8 is a flowchart illustrating a method for retrieving and loading media content at a client device, according to certain example embodiments.

FIG. 9 is an illustration of a boundary generated based on location data sampled by a geo-fence selection system, according to certain example embodiments.

FIG. 10 is a block diagram illustrating a representative software architecture, which may be used in conjunction with various hardware architectures herein described and used to implement various embodiments.

FIG. 11 is a block diagram illustrating components of a machine, according to some example embodiments, able to read instructions from a machine-readable medium (e.g., a machine-readable storage medium) and perform any one or more of the methodologies discussed herein.

DETAILED DESCRIPTION

As discussed above, an inherent limitation with traditional geo-fence technology is the inaccuracy and inconsistency of location data that may be retrieved from a client device. Furthermore, an objective of traditional geo-fences is to load and display content at client devices within geo-fences as quickly as possible. Due to the aforementioned inaccuracies and inconsistencies of location data received from client devices, the presentation of media content may be delayed or not delivered at all.

Thus, the present invention relates to improvements to systems and methods for determining a current location of a client device, and for identifying and selecting appropriate geo-fences based on the current location of the client device. An improved geo-fence selection system performs operations that include associating media content with a geo-fence that encompasses a portion of a predefined geographic region, sampling location data from a client device, defining a boundary based on the sampled location data from the client device, detecting an overlap between the boundary and the geo-fence, retrieving the media content associated with the geo-fence, and loading the media content at a memory location of the client device, in response to detecting the overlap.

In some embodiments, the improved geo-fence selection system samples location data from a client device at predefined intervals (e.g., 30 seconds, 1 minute, 5 minutes, etc.) over a period of time (e.g., 24 hours). For example, the system may ping the client device every interval to retrieve location data, such as Global Positioning System (GPS) data, cell triangulation data, or the like. In further embodiments, the improved geo-fence selection system samples the location data by retrieving the location data from the client in response to certain user actions performed by a user of the client device. For example, the user may provide an input to the client device to check-in to a particular location, or to interact with certain media content presented at the client device, or to launch an application. In response to detecting the user input, the improved geo-fence selection system retrieves location data from the client device and assigned a timestamp to the location data.

The location data may also include temporal data, which the improved geo-fence selection system may utilize to timestamp the retrieved location data. In such embodiments, the improved geo-fence selection system indexes and stores the location data at a database, along with the timestamps.

In response to sampling the location data, the improved geo-fence selection system generates a boundary that indicates a general location of the client device. The boundary defined by the improved geo-fence selection system based on the location data includes a “bounded box.” In geometry, the minimum or smallest bounding or enclosing box for a point set (S) in N dimensions is the box with the smallest measure (area, volume, or hyper-volume in higher dimensions) within which all the points lie. When other kinds of measure are used, the minimum box is usually called accordingly, e.g., “minimum-perimeter bounding box,” or a “bounded box.”

In further embodiments, the boundary defined by the improved geo-fence system based on the location data includes a “convex hull” In mathematics, the convex hull or convex envelope of a set X of points in the Euclidean plane or in a Euclidean space (or, more generally, in an affine space over the reals) is the smallest convex set that contains X. For instance, when X is a bounded subset of the plane, the convex hull may be visualized as the shape enclosed by a rubber band stretched around X.

In further embodiments, the improved geo-fence system calculates an average based on the location data retrieved from the client device, and defines the boundary based on the average of the location data.

In further embodiments, the improved geo-fence system identifies a central point of the client device based on the location data, and generates a boundary that expands a predefined radius from the central point and encompasses the location data of the client device.

The improved geo-fence system detects overlaps and intersections of the boundary (that identifies a location of the client device with one or more geo-fences within a geographic area. In response to detecting the overlaps and intersections of the boundary that defines the location of the client device with the one or more geo-fences, the improved geo-fence system retrieves media content associated with the one or more geo-fences, and loads the media content at a memory location of the client device.

In some embodiments, a larger boundary such as a map tile may encompass the one or more geo-fences. In such embodiments, the improved geo-fence system may detect overlaps of the boundary that defines the location of the client device and a border of the map tile. In response to detecting the overlap with the boundary that defines the location of the client device and the border of the map tile, the improved geo-fence system identifies the one or more geo-fences within the map tile, and retrieves media content associated with the one or more geo-fences. The retrieved media content may then be loaded at the client device.

In further embodiments, in response to detecting the overlap with the boundary that defines the location of the client device and the border of the map tile, the improved geo-fence system identifies the one or more geo-fences within the map tile, then detects whether or not a social network connection of the user of the client device is within any of the one or more geo-fences. Upon identifying a social network connection of the user of the client device within a geo-fence from among the one or more geo-fences, the improved geo-fence system retrieves the media content associated with the geo-fence, and loads it at the client device.

In some example embodiments, the improved geo-fence system detects a current location of a client device, and accesses a database that contains the sampled location data from the client device to predict a future location of the client device. For example, the improved geo-fence system may determine a trajectory of the client device based on the sampled location data and the timestamps of the sampled location data, and may identify one or more geo-fences based on the trajectory. In further embodiments, the improved geo-fence system may identify relationships between locations identified by the location data based on the timestamps. For example, the improved geo-fence system may determine that when a user is at a first location (e.g., work), the always go to a second location (e.g., home) within a period of time. The improved geo-fence system may identify these relationships and load media content at the client device based on the next predicted location of the client device, based on the current location of the client device and a current time.

FIG. 1 is a block diagram showing an example messaging system 100 for exchanging data (e.g., messages and associated content) over a network. The messaging system 100 includes multiple client devices 102, each of which hosts a number of applications including a messaging client application 104. Each messaging client application 104 is communicatively coupled to other instances of the messaging client application 104 and a messaging server system 108 via a network 106 (e.g., the Internet).

Accordingly, each messaging client application 104 is able to communicate and exchange data with another messaging client application 104 and with the messaging server system 108 via the network 106. The data exchanged between messaging client applications 104, and between a messaging client application 104 and the messaging server system 108, includes functions (e.g., commands to invoke functions) as well as payload data (e.g., text, audio, video or other multimedia data).

The messaging server system 108 provides server-side functionality via the network 106 to a particular messaging client application 104. While certain functions of the messaging system 100 are described herein as being performed by either a messaging client application 104 or by the messaging server system 108, it will be appreciated that the location of certain functionality either within the messaging client application 104 or the messaging server system 108 is a design choice. For example, it may be technically preferable to initially deploy certain technology and functionality within the messaging server system 108, but to later migrate this technology and functionality to the messaging client application 104 where a client device 102 has a sufficient processing capacity.

The messaging server system 108 supports various services and operations that are provided to the messaging client application 104. Such operations include transmitting data to, receiving data from, and processing data generated by the messaging client application 104. In some embodiments, this data includes, message content, client device information, geolocation information, media annotation and overlays, message content persistence conditions, social network information, and live event information, as examples. In other embodiments, other data is used. Data exchanges within the messaging system 100 are invoked and controlled through functions available via GUIs of the messaging client application 104.

Turning now specifically to the messaging server system 108, an Application Program Interface (API) server 110 is coupled to, and provides a programmatic interface to, an application server 112. The application server 112 is communicatively coupled to a database server 118, which facilitates access to a database 120 in which is stored data associated with messages processed by the application server 112.

Dealing specifically with the Application Program Interface (API) server 110, this server receives and transmits message data (e.g., commands and message payloads) between the client device 102 and the application server 112. Specifically, the Application Program Interface (API) server 110 provides a set of interfaces (e.g., routines and protocols) that can be called or queried by the messaging client application 104 in order to invoke functionality of the application server 112. The Application Program Interface (API) server 110 exposes various functions supported by the application server 112, including account registration, login functionality, the sending of messages, via the application server 112, from a particular messaging client application 104 to another messaging client application 104, the sending of media files (e.g., images or video) from a messaging client application 104 to the messaging server application 114, and for possible access by another messaging client application 104, the setting of a collection of media data (e.g., story), the retrieval of a list of friends of a user of a client device 102, the retrieval of such collections, the retrieval of messages and content, the adding and deletion of friends to a social graph, the location of friends within a social graph, opening and application event (e.g., relating to the messaging client application 104).

The application server 112 hosts a number of applications and subsystems, including a messaging server application 114, an image processing system 116, a social network system 122, and a geo-fence selection system 124. The messaging server application 114 implements a number of message processing technologies and functions, particularly related to the aggregation and other processing of content (e.g., textual and multimedia content) included in messages received from multiple instances of the messaging client application 104. As will be described in further detail, the text and media. content from multiple sources may be aggregated into collections of content (e.g., called stories or galleries). These collections are then made available, by the messaging server application 114, to the messaging client application 104. Other processor and memory intensive processing of data may also be performed server-side by the messaging server application 114, in view of the hardware requirements for such processing.

The application server 112 also includes an image processing system 116 that is dedicated to performing various image processing operations, typically with respect to images or video received within the payload of a message at the messaging server application 114.

The social network system 122 supports various social networking functions services, and makes these functions and services available to the messaging server application 114. To this end, the social network system 122 maintains and accesses an entity graph 304 within the database 120. Examples of functions and services supported by the social network system 122 include the identification of other users of the messaging system 100 with which a particular user has relationships or is “following,” and also the identification of other entities and interests of a particular user.

The application server 112 is communicatively coupled to a database server 118, which facilitates access to a database 120 in which is stored data associated with messages processed by the messaging server application 114.

FIG. 2 is block diagram illustrating further details regarding the messaging system 100, according to example embodiments. Specifically, the messaging system 100 is shown to comprise the messaging client application 104 and the application server 112, which in turn embody a number of some subsystems, namely an ephemeral timer system 202, a collection management system 204 and an annotation system 206.

The ephemeral timer system 202 is responsible for enforcing the temporary access to content permitted by the messaging client application 104 and the messaging server application 114. To this end, the ephemeral tinier system 202 incorporates a number of timers that, based on duration and display parameters associated with a message, collection of messages (e.g., a SNAPCHAT story), or graphical element. selectively display and enable access to messages and associated content via the messaging client application 104. Further details regarding the operation of the ephemeral timer system 202 are provided below.

The collection management system 204 is responsible for managing collections of media (e.g., collections of text, image video and audio data). In some examples, a collection of content (e.g., messages, including images, video, text and audio) may be organized into an “event gallery” or an “event story.” Such a collection may be made available for a specified time period, such as the duration of an event to which the content relates. For example, content relating to a music concert may be made available as a “story” for the duration of that music concert. The collection management system 204 may also be responsible for publishing an icon that provides notification of the existence of a particular collection to the user interface of the messaging client application 104.

The collection management system 204 furthermore includes a curation interface 208 that allows a collection manager to manage and curate a particular collection of content. For example, the curation interface 208 enables an event organizer to curate a collection of content relating to a specific event (e.g., delete inappropriate content or redundant messages). Additionally, the collection management system 204 employs machine vision (or image recognition technology) and content rules to automatically curate a content collection. In certain embodiments, compensation may be paid to a user for inclusion of user generated content into a collection. In such cases, the curation interface 208 operates to automatically make payments to such users for the use of their content.

The annotation system 206 provides various functions that enable a user to annotate or otherwise modify or edit media content associated with a message. For example, the annotation system 206 provides functions related to the generation and publishing of media overlays for messages processed by the messaging system 100. The annotation system 206 operatively supplies a media overlay (e.g., a SNAPCHAT filter) to the messaging client application 104 based on a geolocation of the client device 102. In another example, the annotation system 206 operatively supplies a media overlay to the messaging client application 104 based on other information, such as, social network information of the user of the client device 102. A media overlay may include audio and visual content and visual effects. Examples of audio and visual content include pictures, texts, logos, animations, and sound effects, as well as animated facial models, such as those generated by the geo-fence selection system 124. An example of a visual effect includes color overlaying. The audio and visual content or the visual effects can be applied to a media content item (e.g., a photo) at the client device 102. For example, the media overlay including text that can be overlaid on top of a photograph generated taken by the client device 102. In another example, the media overlay includes an identification of a location overlay (e.g., Venice beach), a name of a live event, or a name of a merchant overlay (e.g., Beach Coffee House). In another example, the annotation system 206 uses the geolocation of the client device 102 to identify a media overlay that includes the name of a merchant at the geolocation of the client device 102. The media overlay may include other indicia associated with the merchant. The media overlays may be stored in the database 120 and accessed through the database server 118.

In one example embodiment, the annotation system 206 provides a user-based publication platform that enables users to select a geolocation on a map, and upload content associated with the selected geolocation. The user may also specify circumstances under which a particular media overlay should be offered to other users. The annotation system 206 generates a media overlay that includes the uploaded content and associates the uploaded content with the selected geolocation.

In another example embodiment, the annotation system 206 provides a merchant-based publication platform that enables merchants to select a particular media overlay associated with a geolocation via a bidding process. For example, the annotation system 206 associates the media overlay of a highest bidding merchant with a corresponding geolocation for a predefined amount of time

FIG. 3 is a block diagram illustrating components of the geo-fence selection system 124 that configure the geo-fence selection system 124 to associate media content with a geo-fence, sample location data from a client device, define a boundary that identifies a location of the client device, detect an overlap between the boundary and a geo-fence, and retrieve and load the media content of the geo-fence at a memory location of the client device, according to some example embodiments. The geo-fence selection system 124 is shown as including a geo-fencing module 302, a location module 304, a communication module 306, and presentation module 308, all configured to communicate with each other (e.g., via a bus, shared memory, or a switch). Any one or more of these modules may be implemented using one or more processors 310 (e.g., by configuring such one or more processors to perform functions described for that module) and hence may include one or more of the processors 310.

Any one or more of the modules described may be implemented using hardware alone (e.g., one or more of the processors 310 of a machine) or a combination of hardware and software. For example, any module described of the geo-fence selection system 124 may physically include an arrangement of one or more of the processors 310 (e.g., a subset of or among the one or more processors of the machine) configured to perform the operations described herein for that module. As another example, any module of the geo-fence selection system 124 may include software, hardware, or both, that configure an arrangement of one or more processors 310 (e.g., among the one or more processors of the machine) to perform the operations described herein for that module. Accordingly, different modules of the geo-fence selection system 124 may include and configure different arrangements of such processors 310 or a single arrangement of such processors 310 at different points in time. Moreover, any two or more modules of the geo-fence selection system 124 may be combined into a single module, and the functions described herein for a single module may be subdivided among multiple modules. Furthermore, according to various example embodiments, modules described herein as being implemented within a single machine, database, or device may be distributed across multiple machines, databases, or devices.

FIG. 4 is a flowchart illustrating a method 400 for retrieving and loading media content at a client device, according to certain example embodiments. Operations of the method 400 may be performed by the modules described above with respect to FIG. 3. As shown in FIG. 4, the method 400 includes one or more operations 402, 404, 406, 408, and 410.

At operation 402, the geo-fencing module 302 receives a user input to associate media content with a geo-fence that encompasses a portion of a geographic region. For example, the media content may comprise image data, video data, filters, messages, as well as interactive media content. A user may associate the media content with a geo-fence such that the media content is only accessible or available through client devices located within the geo-fence, or which have at some point transgressed a border of the geo-fence.

At operation 404, the location module 304 samples location data from a client device. In some example embodiments, the location module 304 samples the location data from a client device 102 at predefined intervals (e.g., 30 seconds, 1 minute, 5 minutes, etc.) over a period of time (e.g., 24 hours). For example, the system may ping the client device every interval to retrieve location data, such as Global Positioning System (GPS) data, cell triangulation data, or the like. In further embodiments, the location module 304 samples the location data by retrieving the location data from the client device 102 in response to certain user actions performed by a user of the client device 102. For example, the user may provide an input to the client device 102 to check-in to a particular location, or to interact with certain media content presented at the client device, or to launch an application. In response to detecting the user input, the location module 304 retrieves location data from the client device 102 and assigns a timestamp to the location data.

At operation 406, the location module 304 defines a boundary based on the location data retrieved from the client device 102 over the predefined period of time, wherein the boundary defined by the location module 304 provides an indication of a location of the client device 102 over the predefined period of time. In some embodiments, the boundary defined by the location module 204 based on the location data retrieved from the client device 102 includes one or more of: a bounded box; an average location; a radius; and a convex hull.

At operation 408, the location module 304 detects an overlap between the geo-fence and the boundary that identifies a location of the client device 102 over the predefined period of time. In response to detecting the overlap between the boundary and the geo-fence, at operation 410, the communication module 306 loads the media content of the geo-fence at a memory location of the client device 102, wherein the presentation module 308 may generate and cause display of a presentation of the media content.

FIG. 5A is an illustration 500A of location data (e.g., location data 502) sampled from a client device 102 by the location module 304 of the geo-fence selection system 124, as discussed in the method 400, and according to certain example embodiments. The illustration 500A includes a depiction of a geo-fence 506 that encompasses a portion of a predefined geographic region.

FIG. 5B is an illustration 500B of a boundary 504B generated based on the sampled location data (e.g., location data 502) by the location module 304 of the geo-fence selection system 124, as discussed in the method 400, and according to certain example embodiments. As seen in FIG. 5B, the boundary 504B may intersect or overlap with the geo-fence 506.

The boundary 504B may for example include a “bounded box,” In geometry, the minimum or smallest bounding or enclosing box for a point set (S) in N dimensions is the box with the smallest measure (area, volume, or hyper-volume in higher dimensions) within which all the points lie.

FIG. 5C is an illustration 500C of another embodiment, in which a boundary 504C is generated based on sampled location data (e.g., location data 502), by the location module 304 of the geo-fence selection system 124, as discussed in the method 400, and according to certain example embodiments. As seen in FIG. 5C, the boundary 504C may be defined based on an average location, or a central point of the client device 102 based on the location data.

FIG. 6 is a flowchart illustrating a method 600 for retrieving and loading media content at a client device (e.g., client device 102) according to certain example embodiments. Operations of the method 600 may be performed by the modules described above with respect to FIG. 3. As shown in FIG. 6, the method 600 includes one or more operations 602, 604, 606, and 608. Operations of the method 600 may be performed as a subroutine or portion of any of the operations of the method 400 of FIG. 4.

At operation 602, the location module 304 associates the sampled location data from the client device 102 with a time of day within a database associated with a user of the client device 102. The location module 304 may timestamp the location data retrieved from the client device 102, such that the timestamps indicate a time in which the location data was retrieved from the client device.

At operation 604, the location module 304 identifies a location (e.g., a past location of the client device 102) based on a time of day (e.g., a current time of day, or an impending time of day). For example, the timestamped location data may indicate that on most days, the client device 102 is at a location (e.g., work) at a certain time (e.g., noon).

At operation 606, the geo-fencing module 302 identifies one or more geo-fences that intersect a boundary that defines a location of the client device 102 at the certain time of day, based on the sampled location data within the database.

At operation 608, the geo-fencing module retrieves media content associated with the one or more geo-fences, and at operation 610, the communication module 306 loads the retrieved media content at the client device 102, at a time earlier than the certain time of day corresponding to the historical location data.

FIG. 7 is a table 700 comprising location data and timestamps, as discussed with respect to the operations of the method 600 of FIG. 6, and according to certain example embodiments. As seen in the table 700, the location data may be organized based on corresponding timestamps, wherein the timestamps indicate a time of day in which the client device 102 was at a particular location.

FIG. 8 is a flowchart illustrating a method 800 for retrieving and loading media content at a client device, according to certain example embodiments. Operations of the method 800 may be performed by the modules described above with respect to FIG. 3. As shown in FIG. 8, the method 800 includes one or more operations 802, 804, 806, and 808. Operations of the method 800 may be performed as a subroutine or portion of any of the operations of the method 400 of FIG. 4.

In some embodiments as discussed above, one or more geo-fences may be encompassed by a larger border that defines the geographic region itself, such as a map tile. At operation 802, the location module 304 detects an overlap between the border of the map tile that encompasses the geographic region and the boundary that identifies the location of a first client device (e.g., client device 102A).

In response to detecting the overlap between the border of the map tile and the boundary that identifies the location of the first client device (e.g., client device 102A), at operation 804, the geo-fence module 302 identifies one or more geo-fences within the border of the map tile. In some embodiments, the communication module 306 may load media content associated with the one or more geo-fences within the border of the map tile at the client device 102A in response to detecting the overlap.

In further embodiments, as described in operation 806, the geo-fence module 302 identifies a second client device (e.g., client device 102B) within a first geo-fence located within the border of the map tile. For example, the second client device (e.g., client device 102B) may be associated with a user of the first client device (e.g., client device 102A) based on a social network connection.

In response to detecting a social media connection between a user of the second client device and the user of the first client device, the geo-fencing module 302 retrieves media content associated with the first geo-fence, and loads the media content at the first client device (e.g., client device 102A).

FIG. 9 is an illustration 900 of the boundary 502 generated based on location data sampled by a geo-fence selection system 124, according to certain example embodiments. The illustration 900 also include a depiction of a map tile 902 (e.g., a geographical region predefined by a border of a map tile), and one or more geo-fences that include a first geo-fence 904, and a second geo-fence 906, wherein a user of a second client device 102B is within the first geo-fence 904.

As explained in the method 800 of FIG. 8, in response to detecting the overlap between the border of the map tile 902 and the boundary 502 that identifies the location of the first client device (e.g., client device 102A), the geo-fence module 302 identifies one or more geo-fences within the border 902 (i.e., geo-fence 904 and 906).

In further embodiments, as discussed at operation 806, the geo-fence module 302 identifies a second client device (e.g., client device 102B) within the first geo-fence 904 located within the border 902. In response to detecting the overlap of the boundary 502 with the border of the map the 902, the geo-fence module retrieves media content of the geo-fence 904, and loads the media content at the client device 102A.

Software Architecture

FIG. 10 is a block diagram illustrating an example software architecture 1006, which may be used in conjunction with various hardware architectures herein described. FIG. 10 is a non-limiting example of a software architecture and it will be appreciated that many other architectures may be implemented to facilitate the functionality described herein. The software architecture 1006 may execute on hardware such as machine 1100 of FIG. 11 that includes, among other things, processors 1104, memory 1114, and I/O components 1118. A representative hardware layer 1052 is illustrated and can represent, for example, the machine 1000 of FIG. 10. The representative hardware layer 1052 includes a processing unit 1054 having associated executable instructions 1004. Executable instructions 1004 represent the executable instructions of the software architecture 1006, including implementation of the methods, components and so forth described herein. The hardware layer 1052 also includes memory and/or storage modules memory/storage 1056, which also have executable instructions 1004. The hardware layer 1052 may also comprise other hardware 1058.

In the example architecture of FIG. 10, the software architecture 1006 may be conceptualized as a stack of layers where each layer provides particular functionality. For example, the software architecture 1006 may include layers such as an operating system 1002, libraries 1020, applications 1016 and a presentation layer 1014. Operationally, the applications 1016 and/or other components within the layers may invoke application programming interface (API) API calls 1008 through the software stack and receive a response as in response to the API calls 1008. The layers illustrated are representative in nature and not all software architectures have all layers. For example, some mobile or special purpose operating systems may not provide a frameworks/middleware 1018, while others may provide such a layer. Other software architectures may include additional or different layers.

The operating system 1002 may manage hardware resources and provide common services. The operating system 1002 may include, for example, a kernel 1022, services 1024 and drivers 1026. The kernel 1022 may act as an abstraction layer between the hardware and the other software layers. For example, the kernel 1022 may be responsible for memory management, processor management (e.g., scheduling), component management, networking, security settings, and so on. The services 1024 may provide other common services for the other software layers. The drivers 1026 are responsible for controlling or interfacing with the underlying hardware. For instance, the drivers 1026 include display drivers, camera drivers, Bluetooth® drivers, flash memory drivers, serial communication drivers (e.g., Universal Serial Bus (USB) drivers), Wi-Fi® drivers, audio drivers, power management drivers, and so forth depending on the hardware configuration.

The libraries 1020 provide a common infrastructure that is used by the applications 1016 and/or other components and/or layers. The libraries 1020 provide functionality that allows other software components to perform tasks in an easier fashion than to interface directly with the underlying operating system 1002 functionality (e.g., kernel 1022, services 1024 and/or drivers 1026). The libraries 1020 may include system libraries 1044 (e.g., C standard library) that may provide functions such as memory allocation functions, string manipulation functions, mathematical functions, and the like. In addition, the libraries 1020 may include API libraries 1046 such as media libraries (e.g., libraries to support presentation and manipulation of various media format such as MPREG4, H.264, MP3, AAC, AMR, JPG, PNG), graphics libraries (e.g., an OpenGL framework that may be used to render 2D and 3D in a graphic content on a display), database libraries (e.g., SQLite that may provide various relational database functions), web libraries (e.g., WebKit that may provide web browsing functionality), and the like. The libraries 1020 may also include a wide variety of other libraries 1048 to provide many other APIs to the applications 1016 and other software components/modules.

The frameworks/middleware 1018 (also sometimes referred to as middleware) provide a higher-level common infrastructure that may be used by the applications 1016 and/or other software components/modules. For example, the frameworks/middleware 1018 may provide various graphic user interface (GUI) functions, high-level resource management, high-level location services, and so forth. The frameworks/middleware 1018 may provide a broad spectrum of other APIs that may be utilized by the applications 1016 and/or other software components/modules, some of which may be specific to a particular operating system 1002 or platform.

The applications 1016 include built-in applications 1038 and/or third-party applications 1040. Examples of representative built-in applications 1038 may include, but are not limited to, a contacts application, a browser application, a book reader application, a location application, a media application, a messaging application, and/or a game application. Third-party applications 1040 may include an application developed using the ANDROID™ or IOS™ software development kit (SDK) by an entity other than the vendor of the particular platform, and may be mobile software running on a mobile operating system such as IOS™, ANDROID™, WINDOWS® Phone, or other mobile operating systems. The third-party applications 1040 may invoke the API calls 1008 provided by the mobile operating system (such as operating system 1002) to facilitate functionality described herein.

The applications 1016 may use built in operating system functions (e.g., kernel 1022, services 1024 and/or drivers 1026), libraries 1020, and frameworks/middleware 1018 to create user interfaces to interact with users of the system. Alternatively, or additionally, in some systems interactions with a user may occur through a presentation layer, such as presentation layer 1014. In these systems, the application/component “logic” can be separated from the aspects of the application/component that interact with a user.

FIG. 11 is a block diagram illustrating components of a machine 1100, according to some example embodiments, able to read instructions from a machine-readable medium (e.g., a machine-readable storage medium) and perform any one or more of the methodologies discussed herein. Specifically, FIG. 11 shows a diagrammatic representation of the machine 1100 in the example form of a computer system, within which instructions 1110 (e.g., software, a program, an application, an applet, an app, or other executable code) for causing the machine 1100 to perform any one or more of the methodologies discussed herein may be executed. As such, the instructions 1110 may be used to implement modules or components described herein. The instructions 1110 transform the general, non-programmed machine 1100 into a particular machine 1100 programmed to carry out the described and illustrated functions in the manner described. In alternative embodiments, the machine 1100 operates as a standalone device or may be coupled (e.g., networked) to other machines. In a networked deployment, the machine 1100 may operate in the capacity of a server machine or a client machine in a server-client network environment, or as a peer machine in a peer-to-peer (or distributed) network environment. The machine 1100 may comprise, but not be limited to, a server computer, a client computer, a personal computer (PC), a tablet computer, a laptop computer, a netbook, a set-top box (STB), a personal digital assistant (PDA), an entertainment media system, a cellular telephone, a smart phone, a mobile device, a wearable device (e.g., a smart watch), a smart home device (e.g., a smart appliance), other smart devices, a web appliance, a network router, a network switch, a network bridge, or any machine capable of executing the instructions 1110, sequentially or otherwise, that specify actions to be taken by machine 1100. Further, while only a single machine 1100 is illustrated, the term “machine” shall also be taken to include a collection of machines that individually or jointly execute the instructions 1110 to perform any one or more of the methodologies discussed herein.

The machine 1100 may include processors 1104, memory memory/storage 1106, and I/O components 1118, which may be configured to communicate with each other such as via a bus 1102. The memory/storage 1106 may include a memory 1114, such as a main memory, or other memory storage, and a storage unit 1116, both accessible to the processors 1104 such as via the bus 1102. The storage unit 1116 and memory 1114 store the instructions 1110 embodying any one or more of the methodologies or functions described herein. The instructions 1110 may also reside, completely or partially, within the memory 1114, within the storage unit 1116, within at least one of the processors 1104 (e.g., within the processor's cache memory), or any suitable combination thereof, during execution thereof by the machine 1100. Accordingly, the memory 1114, the storage unit 1116, and the memory of processors 1104 are examples of machine-readable media.

The I/O components 1118 may include a wide variety of components to receive input, provide output, produce output, transmit information, exchange information, capture measurements, and so on. The specific I/O components 1118 that are included in a particular machine 1100 will depend on the type of machine. For example, portable machines such as mobile phones will likely include a touch input device or other such input mechanisms, while a headless server machine will likely not include such a touch input device. It will be appreciated that the I/O components 1118 may include many other components that are not shown in FIG. 11. The I/O components 1118 are grouped according to functionality merely for simplifying the following discussion and the grouping is in no way limiting. In various example embodiments, the I/O components 1118 may include output components 1126 and input components 1128. The output components 1126 may include visual components (e.g., a display such as a plasma display panel (PDP), a light emitting diode (LEI)) display, a liquid crystal display (LCD), a projector, or a cathode ray tube (CRT)), acoustic components (e.g., speakers), haptic components (e.g., a vibratory motor, resistance mechanisms), other signal generators, and so forth. The input components 1128 may include alphanumeric input components (e.g., a keyboard, a touch screen configured to receive alphanumeric input, a photo-optical keyboard, or other alphanumeric input components), point based input components (e.g., a mouse, a touchpad, a trackball, a joystick, a motion sensor, or other pointing instrument), tactile input components (e.g., a physical button, a touch screen that provides location and/or force of touches or touch gestures, or other tactile input components), audio input components (e.g., a microphone), and the like.

In further example embodiments, the I/O components 1118 may include biometric components 1130, motion components 1134, environmental environment components 1136, or position components 1138 among a wide array of other components. For example, the biometric components 1130 may include components to detect expressions (e.g., hand expressions, facial expressions, vocal expressions, body gestures, or eye tracking), measure biosignals (e.g., blood pressure, heart rate, body temperature, perspiration, or brain waves), identify a person (e.g., voice identification, retinal identification, facial identification, fingerprint identification, or electroencephalogram based identification), and the like. The motion components 1134 may include acceleration sensor components (e.g., accelerometer), gravitation sensor components, rotation sensor components (e.g., gyroscope), and so forth. The environment components 1136 may include, for example, illumination sensor components (e.g., photometer), temperature sensor components (e.g., one or more thermometer that detect ambient temperature), humidity sensor components, pressure sensor components (e.g., barometer), acoustic sensor components (e.g., one or more microphones that detect background noise), proximity sensor components (e.g., infrared sensors that detect nearby objects), gas sensors (e.g., gas detection sensors to detection concentrations of hazardous gases for safety or to measure pollutants in the atmosphere), or other components that may provide indications, measurements, or signals corresponding to a surrounding physical environment. The position components 1138 may include location sensor components (e.g., a Global Position system (GPS) receiver component), altitude sensor components (e.g., altimeters or barometers that detect air pressure from which altitude may be derived), orientation sensor components (e.g., magnetometers), and the like.

Communication may be implemented using a wide variety of technologies. The I/O components 1118 may include communication components 1140 operable to couple the machine 1100 to a network 1132 or devices 1120 via coupling 1122 and coupling 1124 respectively. For example, the communication components 1140 may include a network interface component or other suitable device to interface with the network 1132. In further examples, communication components 1140 may include wired communication components, wireless communication components, cellular communication components, Near Field Communication (NFC) components, Bluetooth® components (e.g., Bluetooth® Low Energy), Wi-Fi® components, and other communication components to provide communication via other modalities. The devices 1120 may be another machine or any of a wide variety of peripheral devices (e.g., a peripheral device coupled via a Universal Serial Bus (USB)).

Moreover, the communication components 1140 may detect identifiers or include components operable to detect identifiers. For example, the communication components 1140 may include Radio Frequency Identification (RHD) tag reader components, NFC smart tag detection components, optical reader components (e.g., an optical sensor to detect one-dimensional bar codes such as Universal Product Code (UPC) bar code, multi-dimensional bar codes such as Quick Response (QR) code, Aztec code, Data Matrix, Dataglyph, MaxiCode, PDF417, Ultra Code, UCC RSS-2D bar code, and other optical codes), or acoustic detection components (e.g., microphones to identify tagged audio signals). In addition, a variety of information may be derived via the communication components 1140, such as, location via Internet Protocol (IP) geo-location, location via Wi-Fi® signal triangulation, location via detecting a NEC beacon signal that may indicate a particular location, and so forth.

Glossary

“CARRIER SIGNAL” in this context refers to any intangible medium that is capable of storing, encoding, or carrying instructions for execution by the machine, and includes digital or analog communications signals or other intangible medium to facilitate communication of such instructions. Instructions may be transmitted or received over the network using a transmission medium via a network interface device and using any one of a number of well-known transfer protocols.

“CLIENT DEVICE” in this context refers to any machine that interfaces to a communications network to obtain resources from one or more server systems or other client devices. A client device may be, but is not limited to, a mobile phone, desktop computer, laptop, portable digital assistants (PDAs), smart phones, tablets, ultra books, netbooks, laptops, multi-processor systems, microprocessor-based or programmable consumer electronics, game consoles, set-top boxes, or any other communication device that a user may use to access a network.

“COMMUNICATIONS NETWORK” in this context refers to one or more portions of a network that may be an ad hoc network, an intranet, an extranet, a virtual private network (VPN), a local area network (LAN), a wireless LAN (WLAN), a wide area network (WAN), a wireless WAN (WWAN), a metropolitan area network (MAN), the Internet, a portion of the Internet, a portion of the Public Switched Telephone Network (PSTN), a plain old telephone service (POTS) network, a cellular telephone network, a wireless network, a Wi-Fi® network, another type of network, or a combination of two or more such networks. For example, a network or a portion of a network may include a wireless or cellular network and the coupling may be a Code Division Multiple Access (CDMA) connection, a Global System for Mobile communications (GSM) connection, or other type of cellular or wireless coupling n this example, the coupling may implement any of a variety of types of data transfer technology, such as Single Carrier Radio Transmission Technology (1×RTT), Evolution-Data Optimized (EVDO) technology, General Packet Radio Service (GPRS) technology, Enhanced Data rates for GSM Evolution (EDGE) technology, third Generation Partnership Project (3GPP) including 3G, fourth generation wireless (4G) networks, Universal Mobile Telecommunications System (UMTS), High Speed Packet Access (HSPA), Worldwide Interoperability for Microwave Access (WIMAX), Long Term Evolution (LTE) standard, others defined by various standard setting organizations, other long range protocols, or other data transfer technology.

“EMPHEMERAL MESSAGE” in this context refers to a message that is accessible for a time-limited duration. An ephemeral message may be a text, an image, a video and the like. The access time for the ephemeral message may be set by the message sender. Alternatively, the access time may be a default setting or a setting specified by the recipient. Regardless of the setting technique, the message is transitory.

“MACHINE-READABLE MEDIUM” in this context refers to a component, device or other tangible media able to store instructions and data temporarily or permanently and may include, but is not be limited to, random-access memory (RAM), read-only memory (ROM), buffer memory, flash memory, optical media, magnetic media, cache memory, other types of storage (e.g., Erasable Programmable Read-Only Memory (EEPROM)) and/or any suitable combination thereof. The term “machine-readable medium” should be taken to include a single medium or multiple media (e.g., a centralized or distributed database, or associated caches and servers) able to store instructions. The term “machine-readable medium” shall also be taken to include any medium, or combination of multiple media, that is capable of storing instructions (e.g., code) for execution by a machine, such that the instructions, when executed by one or more processors of the machine, cause the machine to perform any one or more of the methodologies described herein. Accordingly, a “machine-readable medium” refers to a single storage apparatus or device, as well as “cloud-based” storage systems or storage networks that include multiple storage apparatus or devices. The term “machine-readable medium” excludes signals per se.

“COMPONENT” in this context refers to a device, physical entity or logic having boundaries defined by function or subroutine calls, branch points, application program interfaces (APIs), or other technologies that provide for the partitioning or modularization of particular processing or control functions. Components may be combined via their interfaces with other components to carry out a machine process. A component may be a packaged functional hardware unit designed for use with other components and a part of a program that usually performs a particular function of related functions. Components may constitute either software components (e.g., code embodied on a machine-readable medium) or hardware components. A “hardware component” is a tangible unit capable of performing certain operations and may be configured or arranged in a certain physical manner. In various example embodiments, one or more computer systems (e.g., a standalone computer system, a client computer system, or a server computer system) or one or more hardware components of a computer system (e.g., a processor or a group of processors) may be configured by software (e.g., an application or application portion) as a hardware component that operates to perform certain operations as described herein. A hardware component may also be implemented mechanically, electronically, or any suitable combination thereof. For example, a hardware component may include dedicated circuitry or logic that is permanently configured to perform certain operations. A hardware component may be a special-purpose processor, such as a Field-Programmable Gate Array (FPGA) or an Application Specific Integrated Circuit (ASIC). A hardware component may also include programmable logic or circuitry that is temporarily configured by software to perform certain operations. For example, a hardware component may include software executed by a general-purpose processor or other programmable processor. Once configured by such software, hardware components become specific machines (or specific components of a machine) uniquely tailored to perform the configured functions and are no longer general-purpose processors. It will be appreciated that the decision to implement a hardware component mechanically, in dedicated and permanently configured circuitry, or in temporarily configured circuitry (e.g., configured by software) may be driven by cost and time considerations. Accordingly, the phrase “hardware component” (or “hardware-implemented component”) should be understood to encompass a tangible entity, be that an entity that is physically constructed, permanently configured (e.g., hardwired), or temporarily configured (e.g., programmed) to operate in a certain manner or to perform certain operations described herein. Considering embodiments in which hardware components are temporarily configured (e.g., programmed), each of the hardware components need not be configured or instantiated at any one instance in time. For example, where a hardware component comprises a general-purpose processor configured by software to become a special-purpose processor, the general-purpose processor may be configured as respectively different special-purpose processors (e.g., comprising different hardware components) at different times. Software accordingly configures a particular processor or processors, for example, to constitute a particular hardware component at one instance of time and to constitute a different hardware component at a different instance of time. Hardware components can provide information to, and receive information from, other hardware components. Accordingly, the described hardware components may be regarded as being communicatively coupled. Where multiple hardware components exist contemporaneously, communications may be achieved through signal transmission (e.g., over appropriate circuits and buses) between or among two or more of the hardware components, in embodiments in which multiple hardware components are configured or instantiated at different times, communications between such hardware components may be achieved, for example, through the storage and retrieval of information in memory structures to which the multiple hardware components have access. For example, one hardware component may perform an operation and store the output of that operation in a memory device to which it is communicatively coupled. A further hardware component may then, at a later time, access the memory device to retrieve and process the stored output. Hardware components may also initiate communications with input or output devices, and can operate on a resource (e.g., a collection of information). The various operations of example methods described herein may be performed, at least partially, by one or more processors that are temporarily configured (e.g., by software) or permanently configured to perform the relevant operations. Whether temporarily or permanently configured, such processors may constitute processor-implemented components that operate to perform one or more operations or functions described herein. As used herein, “processor-implemented component” refers to a hardware component implemented using one or more processors. Similarly, the methods described herein may be at least partially processor-implemented, with a particular processor or processors being an example of hardware. For example, at least some of the operations of a method may be performed by one or more processors or processor-implemented components. Moreover, the one or more processors may also operate to support performance of the relevant operations in a “cloud computing” environment or as a “software as a service” (SaaS). For example, at least some of the operations may be performed by a group of computers (as examples of machines including processors), with these operations being accessible via a network (e.g., the Internet) and via one or more appropriate interfaces (e.g., an Application Program Interface (API)). The performance of certain of the operations may be distributed among the processors, not only residing within a single machine, but deployed across a number of machines. In some example embodiments, the processors or processor-implemented components may be located in a single geographic location (e.g., within a home environment, an office environment, or a server farm). In other example embodiments, the processors or processor-implemented components may be distributed across a number of geographic locations.

“PROCESSOR” in this context refers to any circuit or virtual circuit (a physical circuit emulated by logic executing on an actual processor) that manipulates data values according to control signals (e.g., “commands”, “op codes”, “machine code”, etc.) and which produces corresponding output signals that are applied to operate a machine. A processor may, for example, be a Central Processing Unit (CPU), a Reduced Instruction Set Computing (RISC) processor, a Complex Instruction Set Computing (CISC) processor, a Graphics Processing Unit (GPU), a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Radio-Frequency Integrated Circuit (RTIC) or any combination thereof. A processor may further be a multi-core processor having two or more independent processors (sometimes referred to as “cores”) that may execute instructions contemporaneously.

“TIMESTAMP” in this context refers to a sequence of characters or encoded information identifying when a certain event occurred, for example giving date and time of day, sometimes accurate to a small fraction of a second.

“LIFT” in this context is a measure of the performance of a targeted model at predicting or classifying cases as having an enhanced response (with respect to a population as a whole), measured against a random choice targeting model.

“PHONEME ALIGNMENT” in this context, a phoneme is a unit of speech that differentiates one word from another. One phoneme may consist of a sequence of closure, burst, and aspiration events; or, a dipthong may transition from a back vowel to a front vowel. A speech signal may therefore be described not only by what phonemes it contains, but also the locations of the phonemes. Phoneme alignment may therefore be described as a “time-alignment” of phonemes in a waveform, in order to determine an appropriate sequence and location of each phoneme in a speech signal.

“AUDIO-TO-VISUAL CONVERSION” in this context refers to the conversion of audible speech signals into visible speech, wherein the visible speech may include a mouth shape representative of the audible speech signal.

“TIME DELAYED NEURAL NETWORK (TDNN)” in this context, a TDNN is an artificial neural network architecture whose primary purpose is to work on sequential data. An example would be converting continuous audio into a stream of classified phoneme labels for speech recognition.

“BI-DIRECTIONAL LONG-SHORT TERM MEMORY (BLSTM)” in this context refers to a recurrent neural network (RNN) architecture that remembers values over arbitrary intervals. Stored values are not modified as learning proceeds. RNNs allow forward and backward connections between neurons. BLSTM are well-suited for the classification, processing, and prediction of time series, given time lags of unknown size and duration between events. 

What is claimed is:
 1. A method comprising: associating media content with a geo-fence, the geo-fence encompassing a portion of a geographic region; retrieving location data from a client device, the location data comprising a set of points that identify a plurality of locations of the client device over a period of time; determining a smallest measure that encompasses the set of points that identify the plurality of locations of the client device; defining a boundary based on the smallest measure that encompasses the set of points; detecting an intersection between the boundary and the geo-fence; retrieving the media content associated with the geo-fence responsive to the detecting the intersection between the boundary and the geo-fence; and causing display of the media content at a memory location of the client device.
 2. The method of claim 1, wherein the retrieving the location data from the client device further comprises: receiving a designated input at the client device; and retrieving the location data from the client device in response to the designated input.
 3. The method of claim 1, wherein the retrieving the location data the client device further comprises: defining a sampling period, the sampling period including a sampling interval; and retrieving the location data from the client device based on the sampling interval.
 4. The method of claim 1, wherein the defining the boundary based on the smallest measure includes: generating a bounding box based on the set of points that identify plurality of locations of the client device.
 5. The method of claim 1, wherein the defining the boundary based on the set of points that identify the plurality of locations includes: generating a convex hull based on the set of points that identify the plurality of locations.
 6. The method of claim 1, wherein the defining the boundary based on the set of points that identify the plurality of locations includes: averaging the location data; identifying an average location of the client device based on the averaging the location data; and generating the boundary based on the average location.
 7. The method of claim 1, wherein the loading the media content at the memory location of the client device includes: presenting a representation of the media content within a media gallery at the client device.
 8. The method of claim 1, wherein the loading the media content at the memory location of the client device includes: presenting the media content in an ephemeral message at the client device.
 9. A system comprising: a memory; and at least one hardware processor coupled to the memory and comprising instructions that causes the system to perform operations comprising: associating media content with a geo-fence, the geo-fence encompassing a portion of a geographic region; retrieving location data from a client device, the location data comprising a set of points that identify a plurality of locations of the client device over a period of time; determining a smallest measure that encompasses the set of points that identify the plurality of locations of the client device; defining a boundary based on the smallest measure that encompasses the set of points; detecting an intersection between the boundary and the geo-fence; retrieving the media content associated with the geo-fence responsive to the detecting the intersection between the boundary and the geo-fence; and causing display of the media content at a memory location of the client device.
 10. The system of claim 9, wherein the retrieving the location data from the client device further comprises: receiving a designated input at the client device; and retrieving the location data from the client device in response to the designated input.
 11. The system of claim 9, wherein the retrieving the location data from the client device further comprises: defining a sampling period, the sampling period including a sampling interval; and retrieving the location data from the client device based on the sampling interval.
 12. The system of claim 9, wherein the defining the boundary based on the set of points that identify the plurality of locations includes: generating a convex hull based on the set of points that identify the plurality of locations.
 13. The system of claim 9, wherein the defining the boundary based on the set of points that identify the plurality of locations includes: averaging the location data; identifying an average location of the client device based on the averaging the location data; and generating the boundary based on the average location.
 14. The system of claim 9, wherein the defining the boundary based on the plurality of locations identified by the location data includes: averaging the location data; identifying an average location of the client device based on the averaging the location data; and generating the boundary based on the average location.
 15. The system of claim 9, wherein the loading the media content at the memory location of the client device includes: presenting a representation of the media content within a media gallery at the client device.
 16. The system of claim 9, wherein the loading the media content at the memory location of the client device includes: presenting the media content in an ephemeral message at the client device.
 17. A non-transitory machine-readable storage medium comprising instructions that, when executed by one or more processors of a machine, cause the machine to perform operations comprising: associating media content with a geo-fence, the geo-fence encompassing a portion of a geographic region; retrieving location data from a client device, the location data comprising a set of points that identify a plurality of locations of the client device over a period of time; determining a smallest measure that encompasses the set of points that identify the plurality of locations of the client device; defining a boundary based on the smallest measure that encompasses the set of points; detecting an intersection between the boundary and the geo-fence; retrieving the media content associated with the geo-fence responsive to the detecting the intersection between the boundary and the geo-fence; and causing display of the media content at a memory location of the client device.
 18. The non-transitory machine-readable storage medium of claim 17, wherein the retrieving the location data from the client device further comprises: receiving a designated input at the client device; and retrieving the location data from the client device in response to the designated input.
 19. The non-transitory machine-readable storage medium of claim 17, wherein the retrieving the location data from the client device further comprises: defining a sampling period, the sampling period including a sampling interval; and retrieving the location data from the client device based on the sampling interval.
 20. The non-transitory machine-readable storage medium of claim 17, wherein the defining the boundary based on the set of points that identify the plurality of locations includes: generating a convex hull based on the set of points that identify the plurality of locations. 